Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08267d3f5e36be7…

MALICIOUS

PDF

88.4 KB Created: 2021-06-28 03:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9ea5e62d5064e16a640f4f3130e7a85e SHA-1: 56f686245c4821c111150d482ef1b915f5038093 SHA-256: e08267d3f5e36be7dc70008c4c85c64ebbddb7bc51580fe808600424ef02078c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary attack pattern being the distribution of malicious links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89e0d74c80---56795046781.pdf
    • https://agermag.ro/mm/file/20893436638.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46e699c059---14354887381.pdf
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/femudefunikobini.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e73fd3cd5---95578600277.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d358c8d71---wekojeperoxip.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c09f3d0fb6---gobotakepod.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608502942a8f8---7347776736.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160711813edb6e---dowedobiwej.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/c53b268a474769aac91f9433e4546033/81062248744.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/a1b121f91624d738c21d03106bba8e6c/jopod.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/mlipb9tncnr2qa8e3f0e3pv94v/jufozilisifumoz.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072aeed70398---31841794593.pdf
    • https://unosms.us/userfiles/file/fetajeduperinenewe.pdf
    • https://feng-shuiworld.com/userfiles/file/gogutujumiluge.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e80f4e70e---ruwerejekaniniwevuxe.pdf
    • https://condominiovillage.com/userfiles/file/54028964176.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/7d94e2f84e5e59387cc742e92fbda25a/77859821618.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/7eb27105d35a6c092e4b7ef0cd03a7b5/wefexumowokixuzapanepa.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1fb6916ed9dde3f55ac607e9cf4ba1df/toredemidone.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/t1r7vs0th0okt1rn96mr1qm9jj/73813342128.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4f6b0a4c9---xufuwereb.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/rj1v16cvo4epfpd2chjmg12rt7/rowasoserufenupip.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a59e16276---61438751115.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/h0cg0t876nor0hc2qbugidqgp2/42334571115.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=kingly+anointing+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f80c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF80C 16792 bytes
font_01_sfnt_off0001101e.bin
b3f4b26b0978518e93199fca28e4e9495c7cc6ab9c743b34624c25f6933386f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1101E 16772 bytes
font_02_sfnt_off00013b99.bin
f8b02d597875357e49bf2a078d018577f7b1e7712e9e056e535136d0e6458ab7
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B99 10380 bytes